Strength-testing device.



. PATENTED (m. @1903; R. STOCK & F. F. BOEGNER. STRENGTH TESTING DEVICE.

APPLICATION FILED JAN. 17, 1903 N0 M'GDEL.

INVENTORS wamksses:

QQOWWQE f No. 740,708. .PATENTED 0016,1903. RVSTOGK (86F. F. BOEGNER.

STRENGTH TESTING DEVICE.

APPLIQATIONTILEID JAN. 17. 1903;

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INVENORS Wmfi WITESSES:

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UNITED STATES Patented October 6, 1903.

PATENT OFFICE.

STRENGTH-TESTING DEVICE.-

SPECIFICATION forming part of Letters Patent N0. 740,708, dated October 6, 1903.

. Application filed January 17, 1903. Serial No. 189,437. (No modeL) I To all whom it may concern:

. Be it known that we, ROBERT Sroox and FRANK FJBOEGNER, citizens of the United States, residing at Bridgeport, in the county a part of this specification, Figure 1 is a side elevation of the preferred form of our improvement; Fig. 2, a section at the line was of Fig. 3; Fig. 3, a plan view of the construction shown at Fig. 1, and Figs. 4 and 5 are plan views of modified forms of our improvement. 1

Similar numbers of reference denote like parts in the several figures of the drawings.

Referring to Figs. 1, 2, and 3, 1 2 are stout bars made from metaland curved in the shape of abow, and 3 4 are brace-wires which connect the extreme ends of these bars, said wires in the instance of each bow resembling an ordinary bow-string.

The bar 1 at its center has projecting therefrom two cars 5 6, while projecting from the centerof the bar2isatongue 7, whichlatter fits snugly between said ears. 8 is a bolt which extends through said ears and tongue, so as to constitute a pivotal point, while a nut 9 on the end of the bolt keeps the parts from accidentallybecomingdetached. We have shown in Fig. 2 this bolt provided with a shoulder 10, which rests against the top of atubular standard 11, which latter is provided with any suitable base 12, that is secured to the floor. The lower end of the bolt extendsloosely within the standard 11, and a set-screw 13 is provided within said standard, so that the bolt may be elevated or lowered and secured in any suitable adjustment, so as to bring the bars 1 2 at proper heights for persons operat ing the same. At the extremities of each bar, respectively, are handles 1t 15, and in utilizing our improvement two persons grasp with their hands the extremities of these bars, each person grasping with the right hand the extremity of one bar and with the left hand the extremity of the other bar, the object being to force the handles of the bars together by main strength. If desired, a suitable scale 16 may be marked upon the surface of the upper ear 5, and an index-pointer 17 may be secured .in any suitable manner to the nut 9, so that it may be readily ascertained at a glance what the actual relative test of strength is.

At Fig. 4 we have shown the bars 18 19 crossed after the manner of a pair of scissors and pivoted together at their central portions by means of the bolt 8 and not 9, and this construction may be utilized to obtain a relative test of strength, one person endeavoring to force the ends of the bars together, while the other person should endeavor to spread the opposite ends apart.

The construction shown at Fig. 5 is preciselylike that shown at Fig. 3 except that we provide short bars 20 21, which are pivoted together precisely as is shown at Fig. 3, while the extremities of these bars form sockets into which wooden bars 22 23 are forced.

If desired, springs may be utilized in order to assist in making the tests, and in Fig. 3 we have shown coil-springs 24, which connect the extremities of the bars, and in Fig. 4 similar springs 25, which likewise connect the extremities of the bars, while in Fig. 5

short coil-springs 26 are employed, which connect the extremities of the short bars.

In the construction shown at Figs. 3 and 5 a single person may obtain a very beneficial exercise by endeavoring to force the bars together at one end against the resiliency of the opposing spring and then slightly-relaxing his efforts, repeating the operation, and so on, while the construction shownat Fig. 1 may be utilized by a single person in the opposite manner-that is, by endeavoring to force the ends of the bars apart and then relaxing his elforts, repeating the operation, and so on. lVe do not, however, wish to be limited to the employment of springs in connection with our improvement, since their use is auxiliary rather than necessary.

dered bolt extending loosely within the upper end of said standard, the set-screw driven through said standard and adapted to impinge against said bolt, and extensions from the central portions of said bars pivoted around the upper end of said bolt, substantially as set forth.

In testimony whereof e affix our signatures in presence of two witnesses.

ROBERT STOCK. FRANK F. BOEGNER. Witnesses:

F. W. SMITH, J r., M. T. LONGDEN. 

